XML DOM length attribute

Comment Object

Definition and Usage

length The attribute returns the length of the text in the comment node (in characters).

Syntax

commentNode.length

Example

The following code loads "books_comment.xml" into xmlDoc and retrieves the text node data and length from the first <title> element:

var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
   if (this.readyState == 4 && this.status == 200) {
       myFunction(this);
   }
};
xhttp.open("GET", "books_comment.xml", true);
xhttp.send();
function myFunction(xml) {
    var x, i, xmlDoc, txt;
    xmlDoc = xml.responseXML;
    txt = "";
    x = xmlDoc.getElementsByTagName("book")[0].childNodes;
    for (i = 0; i < x.length; i++) {
    // Only handles comment nodes
        if (x[i].nodeType == 8) {
            txt += x[i].length + "<br>";
        }
    }
    document.getElementById("demo").innerHTML = txt;
}

Try It Yourself

In the above example, we used loops and if test statements to ensure that we only handle comment nodes. The node type of comment nodes is 8.

Comment Object